<!DOCTYPE html>
<html>
    <head>
	<title>相对定位</title>
	<meta charset="UTF-8">
	<style>
	    div{width:300px; height: 300px; background: red;}
	    div span{
		background: #66ff66;
		position: relative;
		top: 10px;
		left: 10px;
	    }
	</style>
    </head>
    <body>

	<div>
	    <span>span标签</span>
	    aaaaaaaaaaaaaaaaaaaaaaaa
	</div>

    </body>
</html>
